export default {
  namespaced: true,
  state: () => ({
    // cart: JSON.parse(uni.getStorageSync('cart') || '[]')

    cart: JSON.parse(uni.getStorageSync('cart') || '[]')
  }),
  mutations: {
    addToCart(state, goods) {
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)

      if (!findResult) {
        state.cart.push(goods)
      } else {
        findResult.goods_count++
      }
      // this.commit('m_cart/saveToStorage')


      this.commit('m_cart/saveToStorage')
    },
    // saveToStorage(state) {
    //   uni.setStorageSync('cart',JSON.stringify(state.cart))
    // }
    // 将购物车中的数据持久化存储到本地
    saveToStorage(state) {
      uni.setStorageSync('cart', JSON.stringify(state.cart))
    },
    updateGoodsState(state, goods) {
      // 根据 goods_id 查询购物车中对应商品的信息对象
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)

      // 有对应的商品信息对象
      if (findResult) {
        // 更新对应商品的勾选状态
        findResult.goods_state = goods.goods_state
        // 持久化存储到本地
        this.commit('m_cart/saveToStorage')
      }
    },
    // 更新购物车中商品的数量
    updateGoodsCount(state, goods) {
      // 根据 goods_id 查询购物车中对应商品的信息对象
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)

      if (findResult) {
        // 更新对应商品的数量
        findResult.goods_count = goods.goods_count
        // 持久化存储到本地
        this.commit('m_cart/saveToStorage')
      }
    },

    // 根据 Id 从购物车中删除对应的商品信息
    removeGoodsById(state, goods_id) {
      // 调用数组的 filter 方法进行过滤
      state.cart = state.cart.filter(x => x.goods_id !== goods_id)
      // 持久化存储到本地
      this.commit('m_cart/saveToStorage')
    },
    updateAllGoodsState(state, newState) {
      state.cart.forEach(x => x.goods_state = newState)
      this.commit('m_cart/saveToStorage')
    }
  },
  // 更新购物车中商品的勾选状态


  getters: {
    total(state) {
      // let c = 0
      // state.cart.forEach(x => c += x.goods_count)
      // return c 
      return state.cart.reduce((total, item) => total += item.goods_count, 0)


    },

    checkedCount(state) {
      return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count, 0)
    },



    checkedGoodsAmount(state) {
     return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count * item.goods_price, 0).toFixed(2)


    }
  }
}
